Reservoir



FIG. 1 is a bottom view of the reservoir showing my new design;

FIG. 2 is a perspective view of the reservoir;

FIG. 3 is a front side, back side, right side and left side view of thereservoir; and,

FIG. 4 is a top view of the reservoir.

The broken lines shown in the drawings are for illustrative purposesonly and form no part of the claimed design.

CLAIM I claim the ornamental design for a reservoir, as shown anddescribed.